Elasticsearch2系に関するメモ その1

elasticsearchの2.0にして1.7からのバージョンアップも考えて、使い方等を調べる。
まずは今回はセットアップ系。

# インストール
これは1系と変わらず。tarを持ってきた、普通に展開するだけ。インストールにはjava7以上が必要とのことだが、2015/11/6時点では「recommended that you use the Oracle JDK version 1.8.0_25. 」とのことらしい

# 設定
```config/elasticsearch.yml
# ======================== Elasticsearch Configuration =========================
#
# NOTE: Elasticsearch comes with reasonable defaults for most settings.
#       Before you set out to tweak and tune the configuration, make sure you
#       understand what are you trying to accomplish and the consequences.
#
# The primary way of configuring a node is via this file. This template lists
# the most important settings you may want to configure for a production cluster.
#
# Please see the documentation for further information on configuration options:
# <http://www.elastic.co/guide/en/elasticsearch/reference/current/setup-configuration.html>
#
# ---------------------------------- Cluster -----------------------------------
#
# Use a descriptive name for your cluster:
#
cluster.name: nakamura_app
#
# ------------------------------------ Node ------------------------------------
#
# Use a descriptive name for the node:
#
node.name: node-1
#
# Add custom attributes to the node:
#
node.rack: r1
#
# ----------------------------------- Paths ------------------------------------
#
# Path to directory where to store the data (separate multiple locations by comma):
#
# path.data: /path/to/data
#
# Path to log files:
#
# path.logs: /path/to/logs
#
# ----------------------------------- Memory -----------------------------------
#
# Lock the memory on startup:
#
# bootstrap.mlockall: true
#
# Make sure that the `ES_HEAP_SIZE` environment variable is set to about half the memory
# available on the system and that the owner of the process is allowed to use this limit.
#
# Elasticsearch performs poorly when the system is swapping the memory.
#
# ---------------------------------- Network -----------------------------------
#
# Set the bind adress to a specific IP (IPv4 or IPv6):
#
network.host: 192.168.25.50
#
# Set a custom port for HTTP:
#
http.port: 9200
#
# For more information, see the documentation at:
# <http://www.elastic.co/guide/en/elasticsearch/reference/current/modules-network.html>
#
# ---------------------------------- Gateway -----------------------------------
#
# Block initial recovery after a full cluster restart until N nodes are started:
#
# gateway.recover_after_nodes: 3
#
# For more information, see the documentation at:
# <http://www.elastic.co/guide/en/elasticsearch/reference/current/modules-gateway.html>
#
# --------------------------------- Discovery ----------------------------------
#
# Elasticsearch nodes will find each other via unicast, by default.
#
# Pass an initial list of hosts to perform discovery when new node is started:
# The default list of hosts is ["127.0.0.1", "[::1]"]
#
# discovery.zen.ping.unicast.hosts: ["host1", "host2"]
#
# Prevent the "split brain" by configuring the majority of nodes (total number of nodes / 2 + 1):
#
# discovery.zen.minimum_master_nodes: 3
#
# For more information, see the documentation at:
# <http://www.elastic.co/guide/en/elasticsearch/reference/current/modules-discovery.html>
#
# ---------------------------------- Various -----------------------------------
#
# Disable starting multiple nodes on a single system:
#
# node.max_local_storage_nodes: 1
#
# Require explicit names when deleting indices:
#
# action.destructive_requires_name: true
```
# 起動
elasticsearchの起動はbin以下のelasticsearchを使う。

## デーモンで起動
```
./elasticsearch -d 
```

## pid
```
elasticsearch -d -p pid
```

# API
詳細は後日まとめるが、filter機能がなくなったよう。

# 公式プラグイン
bin/pluginコマンドでインストール

- [head](https://github.com/mobz/elasticsearch-head)

```
bin/plugin install mobz/elasticsearch-head
```

![headプラグイン.png](https://qiita-image-store.s3.amazonaws.com/0/1686/bc78d28a-49dd-e833-c31d-604381a48215.png)


- [kuromoji](https://www.elastic.co/guide/en/elasticsearch/plugins/2.0/analysis-kuromoji.html)

```
bin/plugin install analysis-kuromoji
```


- [Mavel](https://www.elastic.co/downloads/marvel)
elasticsearch2.0 + kibana4.2